JPH043701Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a workpiece positioning device for a rolling machine, and particularly to one that is capable of selecting a plurality of workpiece positions.

(Prior art) Generally, when spline rolling or gear rolling is performed on a predetermined portion of the outer peripheral surface of a shaft-like workpiece using a rolling device, the portion of the workpiece to be rolled is matched with a pair of upper and lower rack dies of the rolling device. In order to do this, a workpiece positioning device positions the workpiece in the axial direction.

Conventionally, a device shown in FIG. 3, for example, has been generally used as a workpiece positioning device for a rolling machine. In this positioning device, the main center 1
When rolling a rolling portion WA ₁ of a shaft-shaped work W whose both ends are held between the main center 101 and the tail center 102 using a pair of upper and lower rack dies 103a and 103b, the cylinder 104 is driven to
When moved forward, the lower end of the half-split liner member 106 detachably attached to the front end surface of the disc member 105 fixed to the main center 101
The main center 101 is positioned by being locked by a locking member 108 fixed to the tip of the piston rod 107a of the cylinder 107.

In addition, when rolling the rolling portion WA ₂ of the shaft-like workpiece WA with a pair of upper and lower rack dies 109a and 109b, the cylinder 107 is driven and the locking member 10
8 into the guide member 110 and then move the main center 101 further forward, the main center 101 is attached to and detached from the rear end surface of the disk member 111 fixed to the floor opposite to the disk member 105. The main center 101 is positioned by locking the liner member 106 with the freely attached half-shaped liner member 112.

(Problems to be Solved by the Invention) The conventional workpiece positioning device for a rolling machine as described above generally has the following problems.

In other words, when rolling a workpiece of the same model but with different rolling points, or when rolling a shaft workpiece of another model with a different shape and dimensions, the rolling point WA of the previous shaft-like workpiece W may be changed. In many cases, the axial position of the rolling part of the shaft-like workpiece W to be newly rolled differs from ₁ .

For example, in the workpiece positioning device of the rolling machine shown in FIG _.
When attempting to roll the material with a pair of rack dies 103a and 103b, the rolled portion is removed from the disc member 105.
It is necessary to remove the liner member 106 for WA ₁ and install a liner member for rolling point WA ₃ which is thicker than the liner member 106.

Similarly, when rolling a shaft-like workpiece of another model with a different shape and size from the shaft-like workpiece W, it is necessary to install a liner member for the shaft-like workpiece W each time, and each time the shaft-like workpiece changes. There is a problem in that the liner member must be replaced.

(Means for Solving the Problems) A workpiece positioning device for a rolling machine according to the present invention includes a pair of rack dies for rolling a shaft-like workpiece, a main center for receiving and positioning one end of the workpiece, and a main center for receiving and positioning one end of the workpiece. In a rolling device equipped with a tail center that pushes the other end of the work toward the main center, an index plate is fixed to the main center which is supported rotatably and movably in the axial direction, and An indexing mechanism in which a plurality of position regulating parts having different protrusion amounts from the outer end face are provided on the end face perpendicular to the axis on the opposite side to the rack die, and any one of the plurality of position regulating parts is indexed to a predetermined position and rotationally restrained. and a locking mechanism for locking the tip of the position regulating portion selected by the indexing mechanism.

(Function) In the workpiece positioning device for a rolling machine according to the present invention, the shaft-shaped workpiece is held between the main center and the tail center so as to be rotatable around the axis.

In addition, by the indexing mechanism, any one of the plurality of position regulating parts having different protrusion amounts on the end face perpendicular to the axis on the opposite side to the rack die on the indexing plate fixed to the main center is indexed to a predetermined position and rotationally restrained. At the same time, the locking mechanism locks the tip of the position regulating part selected by the indexing mechanism, so
The main center is positioned in place without axial movement.

In this way, by sequentially indexing the plurality of position regulating parts to predetermined positions, rotationally restraining them, and locking the ends, the main center, that is, the workpiece, can be positioned at a plurality of positions equal to the number of position regulating parts. .

(Effect of the invention) According to the workpiece positioning device for a rolling machine according to the invention, as explained above, the plurality of position regulating parts can be sequentially indexed to predetermined positions, rotationally restrained, and the tips can be locked. This allows the main center to be easily positioned at a plurality of positions equal to the number of position regulating parts.

As a result, it is possible to easily perform multiple positions corresponding to the number of position regulating parts without replacing any parts of the workpiece positioning device, so that multiple rolling points of a shaft-shaped workpiece can be efficiently rolled. In addition, even when rolling a plurality of types of shaft-shaped workpieces, it is possible to sufficiently cope with the rolling process by using position regulating portions set in advance of the plurality of position regulating portions.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The workpiece positioning device of the rolling device according to this embodiment is used for spline rolling or gear rolling of the outer circumferential surface of a shaft-like workpiece used for the shaft system of various parts of an automobile, for example, with respect to the rack die of the rolling device. This is for positioning the shaft-like workpiece in the axial direction.

As shown in FIG. 1, the above-mentioned rolling device includes a pair of upper and lower rack dies 1a and 1b for spline rolling a first spline formed portion Wa of a work W, and a pair of upper and lower rack dies 1a and 1b for spline rolling a first spline formed portion Wa of a work W, and a pair of upper and lower rack dies 1a and 1b for spline rolling a first spline formed portion Wa of a work W. a pair of upper and lower rack dice 2a, 2b, an upper die holder 3a that supports the rack dice 1a, 2a and drives them in a direction perpendicular to the plane of the paper;
a lower die holder 3b that supports and drives the workpieces W in a direction perpendicular to the plane of the paper; a main center 4 that receives and positions the front end of the workpiece W; and a tail center that pushes the rear end of the workpiece W toward the main center 4. 5
and a hydraulic cylinder 6 disposed above the front part of the main center 4 to move the main center 4 in the axial direction.

The main center 4 has a large diameter portion 4a that constitutes most of the length of the main center 4 in the front-rear direction, and a small diameter portion 4b that is fixed to the rear end of the large diameter portion 4a and has a conical rear end. It consists of The lower end of the connecting member 7 is attached to the front end of the large diameter portion 4a so as to be rotatable with respect to the main center 4, and the lower end has a pair of front and rear stoppers to prevent the connecting member 7 from moving in the axial direction. The upper end of the connecting member 7 is fixed to the front end of the piston rod 6a of the cylinder 6 disposed in the longitudinal direction. The main center 4 is pivotally supported by bearings 10 via ball bearings 9 at three locations in total, near the rear end, near the center, and near the front end of the large-diameter portion 4a, and by driving the cylinder 6. The main center 4 can be moved in the axial direction via the connecting member 7.

The tail center 5 is coaxial with the main center 4 and has a conical front end, and is movable in the front and rear directions in conjunction with the cylinder 6 by a drive mechanism not shown.

The workpiece W has a conical rear end of the small diameter portion 4b of the main center 4 in contact with a recess formed at the center of the front end thereof, and a tail center is brought into contact with the recess formed at the center of the rear end of the workpiece W. The main center 4 and the tail center 5 are rotatably supported around their axes by bringing the conical front end portions of the support portions 5a of the main center 4 and the tail center 5 into contact with each other.

The above-mentioned rack dies 1a, 1b, 2a, 2b are rod-shaped bodies with a rectangular cross section extending in a direction perpendicular to the plane of the paper,
Spline grooves are formed in the front-rear direction on the lower surfaces of the rack dies 1a and 2a and on the upper surfaces of the rack dies 1b and 2b, respectively, so that the workpiece W can be connected to its first spline forming portion Wa and the pair of rack dies 1a,
1b are in the first rolling position located at the same position in the axial direction as shown in the figure, the rack dies 1a and 1
A spline groove is rolled in the first spline forming portion Wa of the workpiece W by simultaneously moving the spline grooves b in opposite directions perpendicular to the plane of the paper. Similarly, the workpiece W has its second spline formed portion Wb
When the pair of rack dies 2a and 2b are in the second rolling position where they are located at the same position in the axial direction, a spline groove is rolled in the second spline forming portion Wb of the workpiece W by the rack dies 2a and 2b. .

A thick disk-shaped first indexing plate 11 is fixed to a predetermined position of the large diameter portion 4a of the main center 4, and the front end surface 11a of this first indexing plate 11 is attached to the front end surface 11a as shown in FIGS. As shown, four position regulating parts 12a, 12b, 12c, which have different protrusion amounts from the front end surface 11a,
12d are provided at four equal parts of the circumference near the outer periphery. Note that the amount of protrusion from the front end surface 11a increases in the order of position regulating portions 12a, 12b, 12c, and 12d.

In addition, the four position regulating parts 12a, 12b,
The indexing mechanism that indexes any one of 12c and 12d to the lowest locking position and rotationally restrains the first indexing plate 11 includes the first air cylinder 13 and the outer peripheral surface of the first indexing plate 11. 4 position regulating parts 12
Four locking grooves 14c are formed in the front-rear direction from the front end surface 11a to the rear end surface 11b at positions corresponding to four equal parts of the circumference, respectively, corresponding to a, 12b, 12c, and 12d.
14d, 14a, 14b, and a main center rotation drive device 15 that rotates the main center 4 around its axis.
It is equipped with

The main center rotation drive device 15 includes an electric motor 1
The rotational driving force from the output shaft 16a of No. 6 is transferred to the reduction gear 1.
7 and transmits the rotational driving force to the drive pulley 18 via a pair of belts 19.
The signal is transmitted to the driven pulley 21 which is spline-fitted to the spline 20 of the large diameter portion 4a of the main center 4 so as to be movable in the axial direction, thereby driving the main center 4 to rotate around its axis.

The first air cylinder 13 is vertically installed above the main center 4 and above the first index plate 11, and any one of the position regulating parts 12a to 12d is located at the lowest point below the axis of the main center 4. By driving the first air cylinder 13, the piston rod 13a is positioned at the indexed position (for example, in the figure, the position regulating part 12c is at the indexed position).
The first index plate 11 can be rotationally restrained by engaging the engaging member 13b fixed to the tip of the first index plate 11 with the locking grooves 14a to 14d at the top of the first index plate 11.

Then, when the piston rod 13a is retracted upward by a predetermined stroke, the engaging member 13b disengages from the locking grooves 14a to 14d, and the first index plate 11 becomes freely rotatable around the axis.

The length of the first index plate 11 in the axial direction is as follows:
It is longer than the difference in length between the position regulating portion 12d with the largest protrusion amount and the position regulating portion 12a with the smallest protrusion amount, so that even if the positions of the position regulating portions 12a to 12d are switched, the engagement member 13b remains unchanged. Locking grooves 14a to 14
It is designed not to deviate from d.

A first locking mechanism 23 that locks the tips of the position regulating portions 12a to 12d selected by the indexing mechanism and located in the indexed position stands on the floor at a predetermined position below and slightly in front of the first air cylinder 13. an air cylinder 24 provided therein, a rod-shaped locking member 25 with a rectangular cross section fixed to the tip of the piston rod 24a of the air cylinder 24, and a guide member 26 that guides the locking member 25 slidably in the vertical direction; The locking member 25 is provided with a pillar 27 that supports the guide member 26, and the locking member 25 is provided by driving the air cylinder 24.
are position regulating parts 12a to 12d (for example, 12c in the figure) located at the indexing position of the first indexing plate 11
It is driven between a locking position where the tip end is locked from the front so as not to move in the axial direction, and a locking release position where it is retracted downward by a predetermined stroke.

A second index plate 28 having substantially the same structure as the first index plate 11 is fixed to the large diameter portion 4a of the main center 4 a predetermined distance ahead of the first index plate 11, and a second index plate 28 is fixed to the large diameter portion 4a of the main center 4 at a predetermined distance in front of the first index plate 11. 13 and first locking mechanism 23
A second air cylinder 2 having the same structure as the first air cylinder 13 and the locking mechanism 23 is located a predetermined distance ahead of the first air cylinder 13 and the locking mechanism 23, respectively.
9 and a second locking mechanism 30 are arranged, and the second index plate 28, the second air cylinder 29, and the second locking mechanism 3 are arranged.
0, the workpiece W is positioned at the second rolling position, and a pair of rack dies 2a, 2b is used to roll a spline groove in the second spline forming portion Wb.

The operation of the workpiece positioning device of the rolling machine configured as described above will be explained.

With the rack dies 1a, 1b, 2a, and 2b respectively in the rolling standby position outward from the rolling stage in the direction perpendicular to the plane of the paper, the workpiece W is moved between the rear end of the small diameter portion 4b of the main center 4 and the front end of the tail center 5. be held between.

First, to explain the case where the first spline formed part Wa of the workpiece W is rolled by a pair of rack dies 1a and 1b (the first rolling position of the workpiece W), the electric motor 16 is driven and the main center 4 is rotated around the axis. The position regulating portion 12c of the first indexing plate 11 used for rolling the first spline forming portion Wa of the workpiece W is switched to the indexing position.

Next, the air cylinder 24 of the first locking mechanism 23 is driven to switch the locking member 25 from the locking release position to the locking position.

At the same time, the cylinder 6 and the tail center drive motor interlocked therewith are driven to move the main center 4, with the first index plate 11 located behind the first air cylinder 13, forward at a constant speed.

When the main center 4 moves forward and the tip of the position regulating part 12c of the first indexing plate 11 in the indexing position is locked to the upper rear end of the locking member 25, the cylinder 6 and this Stops the tail center drive motor that is linked to the tail center drive motor.

Next, the first air cylinder 13 is driven to prevent the first index plate 11 from rotating around the axis, and the engagement member 13b is switched to the rotation restraint position.
The locking groove 14c of the first index plate 11 is locked at b.

Next, when the pair of rack dies 1a and 1b, which are in the rolling standby position described above, are simultaneously moved in directions perpendicular to the plane of the paper in mutually opposite directions, the workpiece W is moved to the rear end of the small diameter portion 4b of the main center 4 and the tail center. 5
The first spline forming portion Wa of the workpiece W is rotated about a line connecting the front end portions of the workpiece W to form a spline groove.

Next, the case where the second spline formed portion Wb of the work W is rolled by a pair of rack dies 2a and 2b (second rolling position of the work W) will be described. When the rolling process is completed, the pair of rack dies 1a and 1b are switched to the rolling standby position.

Next, the cylinder 24 is driven to switch the position of the locking member 25 from the locking position to the locking release position, and the first air cylinder 13 is driven to switch the position of the locking member 25 from the locking position to the locking release position.
3b from the rotation restraint position to the rotation release position.

Next, in the same procedure as above, the second index plate 28,
The second spline forming part Wb of the workpiece W is positioned in the axial direction by the second air cylinder 29, the second locking mechanism 30, etc., and the pair of rack dies 2a, 2
After rolling a spline groove in the second spline forming part Wb and switching the positions of the pair of rack dies 2a and 2b to the rolling standby position, the tail center 5 is moved slightly rearward and the workpiece W is removed.

Furthermore, even when rolling a different type of workpiece having a different shape from the workpiece W, the first part is set so that the rolling part of the different type of workpiece is rolled by a pair of rack dies 1a, 1b or 2a, 2b. Position regulating portion 1 on the indexing plate 11 and the second indexing plate 28
By setting the protrusion amount for any one of 2a to 12d (for example, 12d), after the rolling of the workpiece W is completed and a different type of workpiece is attached to the transfer device, the workpiece can be moved in the same manner as above. Positioning is performed, and the position regulating portions 12a to 12d are moved to the indexed position by the indexing mechanism.
This can be done by simply selecting and locking with the locking mechanism.

In this way, if the shape and rolling location of the work to be rolled are known in advance, by forming in advance a position regulating part with a protrusion amount corresponding to these, it is possible to easily handle different types of work. I can do it.

Incidentally, it goes without saying that the position regulating parts 12a to 12d on the first indexing plate 11 and the second indexing plate 28 are set independently, and the position regulating parts 12a to 12d are set independently.
The number of 12d is not limited to four, but a large number of four or more may be provided, and all of the position regulating portions 12a to 12d may be formed into a cylindrical cam shape continuous in the circumferential direction.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall configuration diagram of a workpiece positioning device of a rolling machine, Fig. 2 is a front view of an index plate, and Fig. 3 is Fig. 1 according to the prior art. This is a corresponding diagram. W...Work, 1a, 1b...Rack dice,
2a, 2b...Rack die, 4...Main center, 4a...Large diameter part, 4b...Small diameter part, 5...Tail center, 11...First index plate, 12a,
12b, 12c, 12d...position regulating section, 13...
...First air cylinder, 14a, 14b, 14c,
14d...Latching groove, 15...Main center rotation drive device, 23...First locking mechanism, 28...Second index plate, 29...Second air cylinder, 30...Second
Locking mechanism.

Claims (1)

[Scope of claim for utility model registration] A pair of rack dies for rolling a shaft-shaped workpiece,
In the rolling device equipped with a main center that receives and positions one end of the workpiece and a tail center that pushes the other end of the workpiece toward the main center, the main center is rotatably supported and movable in the axial direction. An index plate is fixed to the index plate, and a plurality of position regulating parts having different protrusion amounts from the end face are provided on an axis perpendicular end face of the index plate opposite to the rack die, and any one of the plurality of position regulating members is provided. A work piece of a rolling device, characterized in that it is provided with an indexing mechanism that indexes one to a predetermined position and rotationally restrains the part, and a locking mechanism that locks the tip of the position regulating part selected by the indexing mechanism. Positioning device.